October 2015 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Some news from the growing pharo teacher front

by Offray Vladimir Luna CÃ¡rdenas

Thanks Esteban, Nice to know. Cheers, Offray On 13/10/15 14:24, Esteban A. Maringolo wrote: > > 2015-09-29 8:43 GMT-03:00 Serge Stinckwich <serge.stinckwich(a)gmail.com > <mailto:serge.stinckwich@gmail.com>>: > > Did you have a look to Jupyter notebook ? > https://jupyter.org/ > > This could be nice if we could have a Pharo support for this > (already supported by other > languages like R, Python, Scala, etc ...). > > > Slightly OT: > Google just launched its Datalab product, which is based on Jupyter: > https://cloud.google.com/datalab/ > > > > Esteban A. Maringolo >

Oct. 14, 2015

Re: [Pharo-users] Exploring Pier

by Jimmie Houchin

Hola Offray, Thanks for the positive reply. I was hoping you wouldn't take anything I wrote negatively. On 10/13/2015 12:20 PM, Offray Vladimir Luna CÃ¡rdenas wrote: > Hi Jimmie, > > > > On 05/10/15 09:16, Jimmie Houchin wrote: >> Hello Offray, >> >> My apologies for the delay in reply. I have been on holiday. > > No problem. I'm not as proactive as I would like on this community. > I'm trying to gain time/knowledge to contribute more, but there are > pending answers from me on interesting topics, so thanks for taking > your time to answer. I have grouped your answer in two parts: Pharo > related and other tools related. More comments below. Correct. >> Thanks for the suggestions. I am pretty much wanting to stick with >> Pharo solutions. I want to use and contribute to the Pharo ecosystem. >> >> I believe the more we use our own tools and contribute toward the >> ecosystem the better our tools and the ecosystem will be. In Pharo I >> can possibly offer an occasional bug fix, contribute to documentation >> or tests. >> > [...] >> In Pharo I have Pharo/Smalltalk. Even a simple user can often >> contribute in simple ways. Even as a simple user of a Pharo tool. I >> can submit issues, fix simple issues, improve method or class >> comments, etc. As I learn the Pharo tools and ecosystem I continually >> improve my ability to take care of myself and also contribute to the >> community. I think Pharo is the most user empowering environment I >> have found. > > I agree with you. I share your vision of Smalltalk as the most > empowering environment I have used. First time we meet (vÃa EToys, > Scratch, BotsInc) I felt in love, but weren't ready for each other and > took almost 10 years and Pharo to bring me back (kind of a bittersweet > love story). I'm a simple user, but in this last year after returning > back I have made stuff I just thought/dream about in other > environments. Still a lot of things to learn and rookie code and > practice, but I'm improving faster that in any other environment, > despite of having not as much time to practice as I would like. Even > prototyping is faster... a lot faster. I understand your journey. I too have been a part of this community and Squeak for a long time. However, between what capabilities Squeak/Pharo had and my skill set and project requirements, I have at times had to look elsewhere. Some things require the ability to use external libraries. This sometimes requires skills which I don't have or the current state of FFI/NB isn't friendly for people like me. But I think over time Pharo is becoming more capable and hopefully at some point its interoperability will improve as well. If you have the skills or can live with the few interoperability issues. I haven't found anything that I feel that is as empowering as Pharo. For me my project requirements have changed and I am no longer requiring the use of a proprietary C++/C library. > I want to help Pharo too, by making it talk better with other/external > ways of thinking/practicing computing. For example, after my talk with > Serge about IPtyhon/Jupyter and Grafoscopio (my learning project) it > was clearer to my that interactive documentation and data > visualization was being bridged with objects via scripting (thanks to > embedded playground in the document tree). So you can start thinking > in a more "emergent way": documents and scripts instead of a hierarchy > of objects and messages, and then go from your scripts in documents to > more objectual forms as you clear your mind about the problem. This > practice/thinking was far away ten years ago for grown ups in Etoys, > BotsInc, as also happened with documentation (they happen elsewhere > and not inside the image). I am not sure I understand what you are trying to do here with Jupyter and Grafoscopio. I think Jupyter is exceptionally nice if you are doing Python. I have used it both with Python and Julia. But I don't see why or for what I would use it for if I have a much superior, IMO, live environment in Pharo. Jupyter is a nice option to command line or repl Python. But Pharo (Smalltalk's) image environment is so much more than anything offered easily anywhere else. >> And yes, the other solutions do offer that as well as they are open >> source. But the bar is much higher. I now have to understand their >> ecosystems, languages, and development cultures of a variety of tools. >> > [...] >> Sure I can find lots and lots of other quality tools in other >> languages. But each is their own island. And depending on how broadly >> I spread the net. Different languages, different cultures, different >> licenses, all independent of each other. >> > [...] >> I much prefer the Pharo ecosystem and culture. It is home. >> I know others who like the other tools, and multiplicity of choice. >> And they feel comfortable there. >> > > I prefer Pharo too. I have felt the "red pill" effect talked several > times in the Pharo/Smalltalk culture. You just need to enter the > matrix sometimes to awake others :-), which means that you share their > reality for a while to teach them you can bend the rules or have super > powers after taking the red pill. But you need to enter the matrix to > offer them the red pill. My way to enter the matrix and made that > offer is via interactive documentation, scripting and data > visualization, because this juncture appeals a lot of people beyond > programmers (like myself). > > The way I want to use to evade the complexities of other technologies, > idiosyncrasies and cultures is try to talk only with the backend > (storage formats/schemas) and frontend (these days mostly html). But I > want to use what I already have and know to make that bridge. Put > Pharo/Smalltalk in the existing practices and technologies in a > symbiotic approach (or something like the assimilation of of star > trek's cyborgs, until "resistance is futile", to follow with SciFi > images :-) ). I have blogged recently about a specific case for this > approach here: > > http://mutabit.com/offray/blog/en/entry/2015-10-06-grav-nikola-both I understand your journey here. I am also on a similar journey. I want at some point to have a web presence and some ability to do some interesting things in the cloud. But I also want more control and am not interested in many of the mass technologies or services. I am still very much exploring and learning. I am not sure of the direction I will go and what role Pharo will play. >> Choice is nice. Pharo is mine. >> > > :-)+3 to follow Stepharo and Doru. I love Pharo and it is my first choice. But it will still have to earn its place in my technology stack. So it is nice to have the option of Pharo. And it is still nice to have other options should they become desired or required depending on what one is trying to do. The hard thing to do sometimes is to actually fully express what you are wanting to do and trying to accomplish. Until that is somewhat done. It is really hard to know what is the best way to go. And that is kind of where I am at the moment. But Pharo is good at helping you to try stuff out and explore your problem domain and hopefully make a better informed decision even if Pharo is or is not in that final decision. Thanks. Jimmie

Oct. 14, 2015

Re: [Pharo-users] [Pharo-dev] Random forest in Pharo

by Serge Stinckwich

I don't think so. I followup your message on SciSmalltalk mailing-list. This is something that might interested us ;-) On Wed, Oct 14, 2015 at 4:54 PM, Damien Cassou <damien.cassou(a)inria.fr> wrote: > Hi, > > did anyone implement a Random Forest algorithm in Pharo? > > https://en.wikipedia.org/wiki/Random_forest > > -- > Damien Cassou > http://damiencassou.seasidehosting.st > > "Success is the ability to go from one failure to another without > losing enthusiasm." --Winston Churchill > -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/

Oct. 14, 2015

Random forest in Pharo

by Damien Cassou

Hi, did anyone implement a Random Forest algorithm in Pharo? https://en.wikipedia.org/wiki/Random_forest -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." --Winston Churchill

Oct. 14, 2015

Re: [Pharo-users] Renaming a Class triggers debugger

by Ben Coman

That sounds like a reasonable choice. Anyhow, with build 50384 I can reproduce a similar error as follows... 1. Open fresh image. 2. World > Tools > Recent Messages 3. World > System Browser 4. Package pane > Add package > "AAPackage" 5. Class pane > Add class > "AAClass" 6. Protocol pane > no messages 7. Code pane > replace template with "test1" and save 8. Class pane > right-click "AAClass" > Rename > "AAClass2" > Ok 9. Code pane > replace "test1" with "test2" and save which produces... UndefinedObject(Object)>>doesNotUnderstand: #timeStamp RGMethodDefinition>>stamp [ self class parseTimestampFrom: self stamp default: DateAndTime epoch ] in RGMethodDefinition>>timeStamp [ self at: key put: aBlock value ] in IdentityDictionary(Dictionary)>>at:ifAbsentPut: IdentityDictionary(Dictionary)>>at:ifAbsent: IdentityDictionary(Dictionary)>>at:ifAbsentPut: RGMethodDefinition(RGDefinition)>>annotationNamed:ifAbsentPut: RGMethodDefinition>>timeStamp [ :a :b | a timeStamp > b timeStamp ] in RecentMessageList>>open Array(SequenceableCollection)>>mergeFirst:middle:last:into:by: Array(SequenceableCollection)>>mergeSortFrom:to:src:dst:by: OrderedCollection>>sort: OrderedCollection(SequenceableCollection)>>sorted: MultiColumnListModel(ListModel)>>items: MessageBrowser>>messages: ... WorldMorph>>doOneCycle So thanks Lyn, you found a bug. Did you get this same error, or just similar? Anyhow, it may be the same root cause. However I didn't create an issue in the tracker yet, since I wasn't sure what the title should be... anyone? cheers -ben On Wed, Oct 14, 2015 at 10:27 AM, Lyn Headley <laheadle(a)gmail.com> wrote: > Because Pharo 4 is the latest release. Do I really have to defend this > choice? > > On Tue, Oct 13, 2015 at 2:32 PM, Alexandre Bergel <alexandre.bergel(a)me.com> > wrote: >> >> I have no idea. But why donât you move to Pharo 5? >> >> Cheers, >> Alexandre >> >> >> > On Oct 13, 2015, at 4:36 PM, Lyn Headley <laheadle(a)gmail.com> wrote: >> > >> > Hello, >> > >> > I'm running pharo 4 and I'm having a problem. I recently renamed a >> > class using the rename: menu item in the standard system browser (I >> > believe it's called Nautilus) and now I am getting uncaught exceptions >> > whenever I add or remove a method (three debugger windows pop >> > up). Here is the stack trace; any advice? >> > >> > Thank you. >> > >> > Lyn >> > >> > Author: LynHeadley >> > Date: 2015-10-13T08:51:16.837987-07:00 >> > >> > UndefinedObject(Object)>>doesNotUnderstand: #theMetaClass >> > RGMetaclassDefinition>>realClass >> > RGMethodDefinition(RGElementDefinition)>>realParent >> > RGMethodDefinition(RGElementDefinition)>>realClass >> > RGMethodDefinition>>methodClass >> > ByteSymbol(Symbol)>>value: >> > OrderedCollection>>collect: >> > MessageBrowser>>buildHierarchyForMessages: >> > MessageBrowser>>cacheHierarchyForClasses: >> > MessageBrowser>>messages: >> > [ >> > (item methodClass notNil and: [ item methodClass isObsolete not ]) >> > ifTrue: [ >> > | sel text boolean | >> > boolean := textModel hasUnacceptedEdits. >> > boolean >> > ifTrue: [ text := textModel pendingText ]. >> > sel := listModel selectedItem. >> > self >> > messages: >> > (listModel listItems >> > add: item asFullRingDefinition; >> > yourself). >> > listModel setSelectedItem: sel. >> > boolean >> > ifTrue: [ textModel pendingText: text ] ] ] in >> > MessageBrowser>>methodAdded: >> > WorldState>>runStepMethodsIn: >> > WorldMorph>>runStepMethods >> > WorldState>>doOneCycleNowFor: >> > WorldState>>doOneCycleFor: >> > WorldMorph>>doOneCycle >> > [ >> > [ >> > World doOneCycle. >> > Processor yield. >> > false ] whileFalse: [ ] ] in MorphicUIManager>>spawnNewProcess >> > [ >> > self value. >> > Processor terminateActive ] in BlockClosure>>newProcess >> > >> >> -- >> _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: >> Alexandre Bergel http://www.bergel.eu >> ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. >> >> >> >> >

Oct. 14, 2015

Re: [Pharo-users] Renaming a Class triggers debugger

by Lyn Headley

Because Pharo 4 is the latest release. Do I really have to defend this choice? On Tue, Oct 13, 2015 at 2:32 PM, Alexandre Bergel <alexandre.bergel(a)me.com> wrote: > I have no idea. But why donât you move to Pharo 5? > > Cheers, > Alexandre > > > > On Oct 13, 2015, at 4:36 PM, Lyn Headley <laheadle(a)gmail.com> wrote: > > > > Hello, > > > > I'm running pharo 4 and I'm having a problem. I recently renamed a > > class using the rename: menu item in the standard system browser (I > > believe it's called Nautilus) and now I am getting uncaught exceptions > > whenever I add or remove a method (three debugger windows pop > > up). Here is the stack trace; any advice? > > > > Thank you. > > > > Lyn > > > > Author: LynHeadley > > Date: 2015-10-13T08:51:16.837987-07:00 > > > > UndefinedObject(Object)>>doesNotUnderstand: #theMetaClass > > RGMetaclassDefinition>>realClass > > RGMethodDefinition(RGElementDefinition)>>realParent > > RGMethodDefinition(RGElementDefinition)>>realClass > > RGMethodDefinition>>methodClass > > ByteSymbol(Symbol)>>value: > > OrderedCollection>>collect: > > MessageBrowser>>buildHierarchyForMessages: > > MessageBrowser>>cacheHierarchyForClasses: > > MessageBrowser>>messages: > > [ > > (item methodClass notNil and: [ item methodClass isObsolete not ]) > > ifTrue: [ > > | sel text boolean | > > boolean := textModel hasUnacceptedEdits. > > boolean > > ifTrue: [ text := textModel pendingText ]. > > sel := listModel selectedItem. > > self > > messages: > > (listModel listItems > > add: item asFullRingDefinition; > > yourself). > > listModel setSelectedItem: sel. > > boolean > > ifTrue: [ textModel pendingText: text ] ] ] in > MessageBrowser>>methodAdded: > > WorldState>>runStepMethodsIn: > > WorldMorph>>runStepMethods > > WorldState>>doOneCycleNowFor: > > WorldState>>doOneCycleFor: > > WorldMorph>>doOneCycle > > [ > > [ > > World doOneCycle. > > Processor yield. > > false ] whileFalse: [ ] ] in MorphicUIManager>>spawnNewProcess > > [ > > self value. > > Processor terminateActive ] in BlockClosure>>newProcess > > > > -- > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > Alexandre Bergel http://www.bergel.eu > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > >

Oct. 14, 2015

Re: [Pharo-users] Renaming a Class triggers debugger

by Lyn Headley

Hi Nicolai, I had a bunch of messagebrowsers open, mostly on various classes of Morphic and Montecello packages; nothing that was related to the class I renamed. Since I got your message I have closed the MessageBrowsers, and now there are only two debuggers triggered when I add or remove a method :-) It looks like WorldState's queue of deferredUIMessages contains a stale block or something... runStepMethodsIn: aWorld "Perform periodic activity inbetween event cycles" | queue nextInQueue| "If available dispatch some deferred UI Message" queue := self class deferredUIMessages. [(nextInQueue := queue nextOrNil) isNil] whileFalse: [ nextInQueue value <----- error ]. self runLocalStepMethodsIn: aWorld. "The multi-threaded global Transcript needs to be updated periodically and synchronously with the UI." Transcript stepGlobal. On Tue, Oct 13, 2015 at 2:52 PM, Nicolai Hess <nicolaihess(a)web.de> wrote: > Hi Lyn > > 2015-10-13 21:36 GMT+02:00 Lyn Headley <laheadle(a)gmail.com>: > >> Hello, >> >> I'm running pharo 4 and I'm having a problem. I recently renamed a >> class using the rename: menu item in the standard system browser (I >> believe it's called Nautilus) and now I am getting uncaught exceptions >> whenever I add or remove a method (three debugger windows pop >> up). Here is the stack trace; any advice? >> > > The error is from the MessageBrowser, the MessageBrowser registers itself > for every class change (method added/removed) and tests if this added / > removed > message should be removed/added to its lists. > > Do you have any MessageBrowser open ? > - a sendersOf or implementorsOf > - if so, what search term is used in the browser (see window title) > > I tried to recreate this error but all I could get was a MessageBrowser > with > "nil" entries - no exception was thrown. > > >> >> Thank you. >> >> Lyn >> >> Author: LynHeadley >> Date: 2015-10-13T08:51:16.837987-07:00 >> >> UndefinedObject(Object)>>doesNotUnderstand: #theMetaClass >> RGMetaclassDefinition>>realClass >> RGMethodDefinition(RGElementDefinition)>>realParent >> RGMethodDefinition(RGElementDefinition)>>realClass >> RGMethodDefinition>>methodClass >> ByteSymbol(Symbol)>>value: >> OrderedCollection>>collect: >> MessageBrowser>>buildHierarchyForMessages: >> MessageBrowser>>cacheHierarchyForClasses: >> MessageBrowser>>messages: >> [ >> (item methodClass notNil and: [ item methodClass isObsolete not ]) >> ifTrue: [ >> | sel text boolean | >> boolean := textModel hasUnacceptedEdits. >> boolean >> ifTrue: [ text := textModel pendingText ]. >> sel := listModel selectedItem. >> self >> messages: >> (listModel listItems >> add: item asFullRingDefinition; >> yourself). >> listModel setSelectedItem: sel. >> boolean >> ifTrue: [ textModel pendingText: text ] ] ] in >> MessageBrowser>>methodAdded: >> WorldState>>runStepMethodsIn: >> WorldMorph>>runStepMethods >> WorldState>>doOneCycleNowFor: >> WorldState>>doOneCycleFor: >> WorldMorph>>doOneCycle >> [ >> [ >> World doOneCycle. >> Processor yield. >> false ] whileFalse: [ ] ] in MorphicUIManager>>spawnNewProcess >> [ >> self value. >> Processor terminateActive ] in BlockClosure>>newProcess >> >> >

Oct. 14, 2015

Re: [Pharo-users] Renaming a Class triggers debugger

by Nicolai Hess

Hi Lyn 2015-10-13 21:36 GMT+02:00 Lyn Headley <laheadle(a)gmail.com>: > Hello, > > I'm running pharo 4 and I'm having a problem. I recently renamed a > class using the rename: menu item in the standard system browser (I > believe it's called Nautilus) and now I am getting uncaught exceptions > whenever I add or remove a method (three debugger windows pop > up). Here is the stack trace; any advice? > The error is from the MessageBrowser, the MessageBrowser registers itself for every class change (method added/removed) and tests if this added / removed message should be removed/added to its lists. Do you have any MessageBrowser open ? - a sendersOf or implementorsOf - if so, what search term is used in the browser (see window title) I tried to recreate this error but all I could get was a MessageBrowser with "nil" entries - no exception was thrown. > > Thank you. > > Lyn > > Author: LynHeadley > Date: 2015-10-13T08:51:16.837987-07:00 > > UndefinedObject(Object)>>doesNotUnderstand: #theMetaClass > RGMetaclassDefinition>>realClass > RGMethodDefinition(RGElementDefinition)>>realParent > RGMethodDefinition(RGElementDefinition)>>realClass > RGMethodDefinition>>methodClass > ByteSymbol(Symbol)>>value: > OrderedCollection>>collect: > MessageBrowser>>buildHierarchyForMessages: > MessageBrowser>>cacheHierarchyForClasses: > MessageBrowser>>messages: > [ > (item methodClass notNil and: [ item methodClass isObsolete not ]) > ifTrue: [ > | sel text boolean | > boolean := textModel hasUnacceptedEdits. > boolean > ifTrue: [ text := textModel pendingText ]. > sel := listModel selectedItem. > self > messages: > (listModel listItems > add: item asFullRingDefinition; > yourself). > listModel setSelectedItem: sel. > boolean > ifTrue: [ textModel pendingText: text ] ] ] in MessageBrowser>>methodAdded: > WorldState>>runStepMethodsIn: > WorldMorph>>runStepMethods > WorldState>>doOneCycleNowFor: > WorldState>>doOneCycleFor: > WorldMorph>>doOneCycle > [ > [ > World doOneCycle. > Processor yield. > false ] whileFalse: [ ] ] in MorphicUIManager>>spawnNewProcess > [ > self value. > Processor terminateActive ] in BlockClosure>>newProcess > >

Oct. 13, 2015

Re: [Pharo-users] Renaming a Class triggers debugger

by Alexandre Bergel

I have no idea. But why donât you move to Pharo 5? Cheers, Alexandre > On Oct 13, 2015, at 4:36 PM, Lyn Headley <laheadle(a)gmail.com> wrote: > > Hello, > > I'm running pharo 4 and I'm having a problem. I recently renamed a > class using the rename: menu item in the standard system browser (I > believe it's called Nautilus) and now I am getting uncaught exceptions > whenever I add or remove a method (three debugger windows pop > up). Here is the stack trace; any advice? > > Thank you. > > Lyn > > Author: LynHeadley > Date: 2015-10-13T08:51:16.837987-07:00 > > UndefinedObject(Object)>>doesNotUnderstand: #theMetaClass > RGMetaclassDefinition>>realClass > RGMethodDefinition(RGElementDefinition)>>realParent > RGMethodDefinition(RGElementDefinition)>>realClass > RGMethodDefinition>>methodClass > ByteSymbol(Symbol)>>value: > OrderedCollection>>collect: > MessageBrowser>>buildHierarchyForMessages: > MessageBrowser>>cacheHierarchyForClasses: > MessageBrowser>>messages: > [ > (item methodClass notNil and: [ item methodClass isObsolete not ]) > ifTrue: [ > | sel text boolean | > boolean := textModel hasUnacceptedEdits. > boolean > ifTrue: [ text := textModel pendingText ]. > sel := listModel selectedItem. > self > messages: > (listModel listItems > add: item asFullRingDefinition; > yourself). > listModel setSelectedItem: sel. > boolean > ifTrue: [ textModel pendingText: text ] ] ] in MessageBrowser>>methodAdded: > WorldState>>runStepMethodsIn: > WorldMorph>>runStepMethods > WorldState>>doOneCycleNowFor: > WorldState>>doOneCycleFor: > WorldMorph>>doOneCycle > [ > [ > World doOneCycle. > Processor yield. > false ] whileFalse: [ ] ] in MorphicUIManager>>spawnNewProcess > [ > self value. > Processor terminateActive ] in BlockClosure>>newProcess > -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

Oct. 13, 2015

Re: [Pharo-users] distributed peer2peer sharing app in Pharo

by Juraj Kubelka

Do you mean this one: http://www.squeaksource.com/DGV.html. I will check it out. Thanks. Juraj > On Oct 13, 2015, at 18:04, stepharo <stepharo(a)free.fr> wrote: > > I know that in squeak there was the project of Cees de Groot > Tric on Squeaksource.I can send you the files I got. > >

Oct. 13, 2015